This compact and portable refrigerant scale brings greater performance, reliability and usability to the trade. With the greatest resolution in the industry, and no compromise on capacity, this unit offers features and specs that you don't want to do without. Other features include: auto zero, 110 pound/50kg capacity and removeable control box with prop stand/hanging hook. Compatible with TIF9020 for automatic capability. Operating temp: 32 degrees to 120 degrees F. Power supply: 9VDC.